Senior Software Engineer Web Development

The Senior Software Engineer - Fullstack plays a key role in building and scaling KAST. This is a high-ownership position where you’ll take responsibility for meaningful work from day one, collaborate closely with cross-functional teams, and help turn ambitious goals into real-world outcomes. Your mission is to move fast and raise the bar. You’ll operate in a dynamic, high-growth environment, navigate ambiguity with confidence, and contribute to systems, products, or processes that scale with the company. Quality matters, speed matters, and ownership is non-negotiable. This role is for builders, people who take initiative, think in systems, and care deeply about doing great work. If you’re excited about working at the intersection of technology, execution, and impact, you’ll feel right at home at KAST. Application Deadline June 30, 2026 Department Engineering Employment Type Full Time Location Colombo Workplace type Hybrid Responsibilities Architectural Influence: Lead the design of complex subsystems and ensure the stack evolves with industry best practices. Critical Problem Solving: Debug high-priority production issues and optimize cloud infrastructure for cost and performance. Mentorship: Elevate the entire team’s output through rigorous reviews, technical workshops, and standard-setting. Web3 Integration: Lead the integration of DApp features, smart contract interactions, and wallet providers. Qualifications & Skills Experience: 5–7+ years of experience in high-growth tech environments. Mastery: Expert-level React, Node.js, and Cloud (AWS/GCP) fluency. Leadership: Experience leading large-scale feature deployments and managing technical debt. Communication: Ability to explain complex technical trade-offs to product managers and designers. About KAST KAST is redefining stablecoin banking for global citizens, crypto professionals, Web3-native businesses, and high-inflation markets hungry for USD-backed banking. Backed by top-tier global investors and led by the ex-APAC CEO of Circle, our leadership team spans Circle, Airwallex, Revolut, Wise, Grab, Zoom, AWS, and leading OTC desks. We’ve scaled from zero to nearly a million users at ridiculous speed. Apply Now Our Hiring Process Stage 1:First Technical Interview Stage 2:Secomd Technical Interview Find out more Not quite right? Register your interest to be notified of any roles that come along that meet your criteria. Register Your Interest